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#17
12-19-2020, 09:37 PM
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I have a 4 zone hot water system, over the years I have had all 4 of the same water controllers replaced. There Are more modern (newer) designs but the old ones ARE built like a tank. Typically they drain the water and cut out the old unit and install the pipe and new unit in the system. Mine developed water leaks after 40 years.
In your case the control circuit for the device apparently failed. The other thing is do you have all of the air out of the system? Many times when the control fails over time the valve lets air into the system and less water and more air makes the water temp thru the system much hotter. Tom V.
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